wireless headphones not working

I have a pair of radioshack wireless headphones, and they have worked at various hotels. Now at home I connected them to the verizon cable box, using the appropriate red and white cables. I can hear some of the channels faintly, but i am picking up anther channel, not coming from ny other in the house. Any other house is more than 40 feet away, and this is occurring all the time, at various times during the day.